[USN-6656-1] PostgreSQL vulnerability

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==========================================================================
Ubuntu Security Notice USN-6656-1
February 26, 2024

postgresql-12, postgresql-14, postgresql-15 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

PostgreSQL could be made to run arbitrary SQL.

Software Description:
- postgresql-15: Object-relational SQL database
- postgresql-14: Object-relational SQL database
- postgresql-12: Object-relational SQL database

Details:

It was discovered that PostgreSQL incorrectly handled dropping privileges
when handling REFRESH MATERIALIZED VIEW CONCURRENTLY commands. If a user or
automatic system were tricked into running a specially crafted command, a
remote attacker could possibly use this issue to execute arbitrary SQL
functions.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
postgresql-15 15.6-0ubuntu0.23.10.1
postgresql-client-15 15.6-0ubuntu0.23.10.1

Ubuntu 22.04 LTS:
postgresql-14 14.11-0ubuntu0.22.04.1
postgresql-client-14 14.11-0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
postgresql-12 12.18-0ubuntu0.20.04.1
postgresql-client-12 12.18-0ubuntu0.20.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart PostgreSQL to
make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6656-1
CVE-2024-0985

Package Information:
https://launchpad.net/ubuntu/+source/postgresql-15/15.6-0ubuntu0.23.10.1
https://launchpad.net/ubuntu/+source/postgresql-14/14.11-0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/postgresql-12/12.18-0ubuntu0.20.04.1